What is Reddit's opinion of Anbull Self Priming Water Pump 110V 5.0GPM 55PSI, Industrial Water Pressure Diaphragm Pump with 3/4" Garden Hose Adapters for Liquid Transfer, Marine, Agriculture Applications?

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Okay. I see now. Then I would also say that the emitters present the pump with sufficient resistance to bring flow down to near zero. Give these little mag pumps some resistance, and they just spin with no positive pressure.

I found in some ebb and flow setups that the flow rate from one of these was a bit to high and it got ahead of the overflow riser. When I put a ball valve in line to reduce the flow, I could just barely begin to close it before the flow dropped way too much.

I've used this kind of pump for sprayers. This one happens to be 55PSI and 5 GPM, which is typical. Diaphragm pumps, so they're positive pressure and self-priming and can be mounted higher than the reservoir. They're used for things like drinking water systems on boats, AC pressure booster, etc. Most use internal pressure switches.

https://www.amazon.com/Anbull-Industrial-Diaphragm-Agriculture-Applications/dp/B099YZRB84?th=1